Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/optional/capi/spec_helper.rb

@@ -0,0 +1,109 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+# MRI magic to use built but not installed ruby
+$extmk = false
+
+require 'rbconfig'
+
+OBJDIR ||= File.expand_path("../../../ext/#{RUBY_ENGINE}/#{RUBY_VERSION}", __FILE__)
+mkdir_p(OBJDIR)
+
+def extension_path
+  File.expand_path("../ext", __FILE__)
+end
+
+def object_path
+  OBJDIR
+end
+
+def compile_extension(name)
+  debug = false
+  run_mkmf_in_process = RUBY_ENGINE == 'truffleruby'
+
+  ext = "#{name}_spec"
+  lib = "#{object_path}/#{ext}.#{RbConfig::CONFIG['DLEXT']}"
+  ruby_header = "#{RbConfig::CONFIG['rubyhdrdir']}/ruby.h"
+
+  return lib if File.exist?(lib) and
+                File.mtime(lib) > File.mtime("#{extension_path}/rubyspec.h") and
+                File.mtime(lib) > File.mtime("#{extension_path}/#{ext}.c") and
+                File.mtime(lib) > File.mtime(ruby_header) and
+                true            # sentinel
+
+  # Copy needed source files to tmpdir
+  tmpdir = tmp("cext_#{name}")
+  Dir.mkdir(tmpdir)
+  begin
+    ["rubyspec.h", "#{ext}.c"].each do |file|
+      cp "#{extension_path}/#{file}", "#{tmpdir}/#{file}"
+    end
+
+    Dir.chdir(tmpdir) do
+      if run_mkmf_in_process
+        required = require 'mkmf'
+        # Reinitialize mkmf if already required
+        init_mkmf unless required
+        create_makefile(ext, tmpdir)
+      else
+        File.write("extconf.rb", "require 'mkmf'\n" +
+          "$ruby = ENV.values_at('RUBY_EXE', 'RUBY_FLAGS').join(' ')\n" +
+          # MRI magic to consider building non-bundled extensions
+          "$extout = nil\n" +
+          "create_makefile(#{ext.inspect})\n")
+        output = ruby_exe("extconf.rb")
+        raise "extconf failed:\n#{output}" unless $?.success?
+        $stderr.puts output if debug
+      end
+
+      # Do not capture stderr as we want to show compiler warnings
+      make, opts = setup_make
+      output = IO.popen([make, "V=1", "DESTDIR=", opts], &:read)
+      raise "#{make} failed:\n#{output}" unless $?.success?
+      $stderr.puts output if debug
+
+      cp File.basename(lib), lib
+    end
+  ensure
+    rm_r tmpdir
+  end
+
+  File.chmod(0755, lib)
+  lib
+end
+
+def setup_make
+  make = ENV['MAKE']
+  make ||= (RbConfig::CONFIG['host_os'].include?("mswin") ? "nmake" : "make")
+  make_flags = ENV["MAKEFLAGS"] || ''
+
+  # suppress logo of nmake.exe to stderr
+  if File.basename(make, ".*").downcase == "nmake" and !make_flags.include?("l")
+    ENV["MAKEFLAGS"] = "l#{make_flags}"
+  end
+
+  opts = {}
+  if /(?:\A|\s)--jobserver-(?:auth|fds)=(\d+),(\d+)/ =~ make_flags
+    begin
+      r = IO.for_fd($1.to_i(10), "rb", autoclose: false)
+      w = IO.for_fd($2.to_i(10), "wb", autoclose: false)
+    rescue Errno::EBADF
+    else
+      opts[r] = r
+      opts[w] = w
+    end
+  end
+
+  [make, opts]
+end
+
+def load_extension(name)
+  require compile_extension(name)
+rescue LoadError
+  if %r{/usr/sbin/execerror ruby "\(ld 3 1 main ([/a-zA-Z0-9_\-.]+_spec\.so)"} =~ $!.message
+    system('/usr/sbin/execerror', "#{RbConfig::CONFIG["bindir"]}/ruby", "(ld 3 1 main #{$1}")
+  end
+  raise
+end
+
+# Constants
+CAPI_SIZEOF_LONG = [0].pack('l!').size